Radiator



ed. ze, 1926.

1,604,197 s. w. RUsHMoRE RADIATOR` Filed Nov. 18, 1922 ,/y-ff7 WIH 5 52a @bww/11206 i, W MlLg-Atwwly Patented oa. 26,1926.

SAMUEL W. RUSHMORE, OF PLAINIELD, NEW JERSEY.

RADIATOR.

Application tiled November 18, 1922. Serial No. 601,683.

My present invention relates to radiators of a type principally used ontrucks, in which there is a rigid cast metal frame surrounding andsupporting the relatively thin air-cooling elements. Usually the frameis made up of four integral castings,the radiator top tank, the bottomtank and two intermediate side frame members yspacing apart the top andbottom membersv and framing in the core or honeycomb. the core consistsof vertical tubes which are secured water-tight in slightly resilientbrass top and bottom plates bolted to the top and bottom castings. Thismakes a very rigid construction well adapted for rough usage butgreattrouble has been experienced from breakin of the little tubes ortheir connections w1th the top and ybottom plates. This may be causedmerely by the excessive vibration in use but an important contributingcause is differential expansion or contraction, as when' the tubesbecome very hot while the side frames'are cold. The cold tends toshorten the side castings'while the heat lengthens thev tubes. This,especially when combined with the vibration Aon rough roads', puts agreat strain on thel point where the tubes are brazed or soldered to thebrass top and bottom plates because the space between these plates isrigidly fixed by the length ofthe side castings. Consequently eitherwithor without vibration the soldering may be cracked or the tubes broken.

An extreme condition of this .kind "is 'where radiators of this rigidframe type are` top Aand bo used for up-low condensers for steam inaccordance with the method set forth in my prior Patent No. 1,378,724,granted May 27, 1891. Under such conditions if the radiator has beenassembled without stress at a normal' temperature of say 70 F., coppertubes say 24 inches-long will expand say .03 inch and the side castingswill contract .012 inch,

a total.I difference of .042 inch. That isl to say the tubes may benearly one-sixteenth of an inch longer than the-distance between thettom plates as determined b the length of the side castin The tplgtesing Substantially rigidly he d some teenth of. an inch diterentialexpansion,

.with vibration, breakand when thecore consists ofthe cellular or.honeycomb b1ock.'.In such case instead of Usually giras to Inpract1cen1`uch less than onefsixf Ymunicates Vwith the lower ta -lowerplates respective breaking the small tubes, the core block tends to beripped away from the bottom plate.

My invention for obviating the above and other difficulties contemplatesraising the bottom plate in which the vertical tubes are secured somethree or four inches, preferably making it in the form of an invertedtrough or tank with an edge ange. The flange corresponds to the edge ofthe bottom plate which it is now customary to bolt to the bottom tankcasting, and the sides of the inverted tank-like structure are madespringy preferably by horizontally molded" curves or corrugations toallow a certain amount of elastic vertical movement of the bottom plateto which the tubes are secured, with respect to the flange by which itis rigidly secured ,tou the frame. This permits unequal or opposite exansions and contractions of the tubes wit .respect to the side castings,without imposing any serious strain.

The top sheet could, of course, be similarly made in trough or tank-likeform with corrugated sides, either as a substitute for or in combinationwith the corrugated tank struc-` ture at the bottom.

Thus the invention a plies to that class of i radiators in which ri'gitop and bottom tankw castings are connected by rigid side members andwhere temperature changes in the core and side members are notuniform.

My invention may be more fully understood from the following descriptionin connection with the accompanying drawings, in which Fig. 1 is asectional elevation showing one embodiment of my invention.

llfig.v 2 is a'section on the line 2 2, Fig. 1, an

Fig. 3 is a sectional detail showing a modificatlon. v

In the drawing the-upper tank 1, lower tank 2, and side members 3, 4,are each integral castings, rigidly bolted together. The bottom of uppertank l is formed by the top plate 5 of the core and the top of thebottom tank is formed by the bottom plate 6 of the core. The up r tankcomthrough the tubes 7, 7, the ends of which are expanded,

roesA welded, brazed,l or otherwise secured water tight in perforations8V 9, in said uplper and l ere are Usuall sheet metal fins 9 which arecool Il()v ed by'thew" air draft and which are in'intimato contactlexpansion and contraction is taken care of by flexing of thecorrugations Without imposing any serious strains on the vertical tubes7, 7. f

The inverted trough construction increases the space in the lower tankand this is of.

advantage as aifording more space for steam separation in case theradiator is used as an up-iiow condenser.

15, 16, are the usual lugs for supporting the weight of the radiator onthe frame members of the truck and 17 is the filler pipe adapted to beclosed by a rap.

18, and 19, may be respectively inlet and out-let for circulation of thecooling medium through the bottom of the radiator.

Fig. 3 shows a modification in which the bottom plate 6a of the core isin or near the same plane with the margin portion 14a, which is clampedbetween the rigid side member 3lL and the bottom tank 2a. In this casecircumferential corrugations 13a are formed between clamped margin andthe base of the nearest tube. This may be designed to afford the properdegree of springiness without sacrificing so much space as is requiredfor the inverted trough construction.

I claim:

1. A radiator comprising an air-cooled core and a frame surrounding andprotecting the same, the frame' including castings constituting topandbottom tanks and rigid side members, to the respective upper andlower portions of which castings the top and bottom plates of the coreare secured, the bottom plate being in the form of an inverted trough ortankhaving resilient corrugated sides and a. marginal iange extend-l ingfrom the lower edges of said sides and secured inixed relation to thebottoms of said rigid side members.

2. A radiator comprising rigid top and bottom tank members Aspaced apartb y rigid side members constituting a frame, 1n com-v bination with aradiator v core having top and bottom plates respectively secured t0 theupper and lower tanks, one of said plates having -a corrugated resilientconnectop and bottom tion between its tube engaging area and themzrilil'ginal area whereby it is secured to the ta 3. A radiatorcomprising rigid to and bottom tanks spaced apart by rigi side membersconstituting a trame, in combination with a radiator core havingresilient top and bottom plates respectively secured to the upper andlower tanks, the bottom plate being the bottom of an inverted trough ortank witlii' corrugated sides secured to the bottom tan 4. A radiatorcomprising an air-cooled core and a frame surrounding and protecting thesame, the core being of a type in whichstraight radiator tubes aresecured in resilient top and bottom plates, the frame including top andbottom tanks and rigid side members, to the respective upper andlower'portions of which side members the resilient top and bottom platesof the core are secured, one of said plates being in the form of atrough `or tank having resilient corrugated sides connecting it to saidside members.

5. A radiator comprising an air-cooled core and a frame surrounding andprotecting the same, the core being of a type in which straight radiatortubes are secured in plates, the frame including top and bottom tanksand rigid side members, to the respective upper and lower portions ofwhich side members the top and bottomplates of the core are secured, thebottom plate being in the form of an inverted trough or tank havingresilient corruf gated sides and a marginal flange extending from thelower edges oflsaid sides and .secured in fixed relation to the bottomof said side members.

6. A radiator comprisingrigid top and bottom tanks spaced apart by rigidside Amembers constituting a frame, in combina- .tion with a radiatorcore of a type 1n which straight radiator tubes are secured in resilienttop and bottom plates, and having its top and bottom plates respectivelysecured to the upper and lower tanks, the bottom plate being the bottomof a trough or. tank `with corrugated sides secured to the bottom tank.

Signed at New York, in the countyof New York and State of New York, thissixteenth day of November, A. D. 1922.

l SAMUEL W. aUsHMoRn.

